Definitions for "Assalamu Alaikum"
Peace be upon you--the "official" Islamic greeting.
(Arabic) Standard Muslim greeting that means "Peace be upon you." It is usually answered with "Wa 'alaikumus salam," which means, "And upon you is the peace."
Peace Be Upon You. This is the greeting one should give to your fellow Muslims. The reply to this is " Walaikum Salaam" (And upon you be peace).